A child-resistant package includes a container having a finish with at least one external thread, at least one axial lug on a shoulder spaced from the thread and an external abutment on the finish adjacent to the lug. A closure of integrally molded plastic construction includes a base wall, a peripheral outer wall, and an inner wall spaced from the outer wall and having at least one internal thread for securement to the container finish. The outer wall has diametrically opposed gaps, and the inner wall extends axially in radial alignment with the gaps for circumferential abutment with the at least one lug on the container. The inner wall is flexible inwardly for clearing the lug between the lug and the external abutment, and for permitting removal of the closure from the container finish. The external abutment preferably is in the form of an external bead that extends circumferentially around the finish in alignment with an edge of the lug.